Thread protector



Mar. 3 1925.

P. J. SHRUM THREAD PROTECTOR Filed Feb. 2, 1924 Patented Mar. 3,1925. V

UNITED STATES PATENT OFFICE.

PETER :r. SHRUM, or MoNAoa HEIGHTS, P NNSYL ANIA, Y ASSIGNOR TO COLONA.MANUFACTURING coMrANY, -01 rrr'rsnunen, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

" rrrnmn' rnorncron;

Applicatlon filed February 2, 1924. Serial no. 690,103.

' To all whom 'z't may concern: Beit known that I, PE'rnR J. SERUM, a

citizen of the United States, residing at Monaca Heights, in thecountyof Beaver 6 and State of Pennsylvania, have invented certain new anduseful Improvementsm Thread Protectors, of which thefollowing is aspecification.

My invention consists of an improvement 10 in threadprotectors, and hasfor its object to provide such a device formed of a contin'uous integralring. having interior. securmg or attachln threads,-an outwardlyextending rounde or bulging portion, an in ner coping or protectingshell portion, and an opposite terminal flaring portion, as shall bemore fully hereinafter set forth.

The device is'of the general class illustrated in a co pendingapplication of-mv self and Harold A. Henigen, Serial Nb. 648,493, andthe blank is preferably formed from a section of seamless welded tubing,by a swaging or upsetting operation somewhat like that of our priorPatent No.

' beyond the threaded part forms a protecting 1,475,032 of November 20,1923.

.One preferred form of the device is illustrated in the accompanyingdrawing, in which:

Fig. 1 is a longitudinal sectional view provided with a protector asapplied;

Fig. 2 is an outer end view-of the tector;

' Fig. 3is an enlarged partial sectional view of the cylindrical blankfrom which the device is made, and

Fig. 4 is a similar partial sectional detail view of the device, showingthe several. continuously annular features involved in the completeddevice.

The blank 2 from which the protector of this invention is made, isacylindrical section of seamless or welded tubing, cut to length andpreferably slightly larger in internal diameter than the outsidediameter of the pipe 3 with which it is to be used. Said pipe isprovided at the'ends with-the usual coupling threads 4, the protectionof which in shipping, storage, etc, is the purpose of the presentinvention.

In forming the complete protector from the blank 2, it is desirable thatit shall be provided with a series of securing threads through thethreaded end portion of a pipe "at its outer portion, of standard sizeand proper taper, to be screwed up tightly so as to bind on the outerthreads 4 of pipe 3 when the device has been screwed on sufficiently forcomplete protection. To this end, the interior'of the inner end portionis not threaded-fora distance inwardly, indicated by the dimensionletter a, Fig. 4,

the remainderof the shell being threaded to its outer end for theremainder of its length, or forthe combined length of dimensions Z) anda, respectively, except that portion of the flare which extends beyondthe diameter. The effective holding threads 5 are those extendingthrough so much of the middle portion of the protector as is indicatedby Z), approximating or slightly less in length than the unthreaded oroverlapping portion a.

mension c, is abruptly deflected outwardly, forming the innernon-contacting surface of the flaring rim 6. It will be observed thatall that "portion of the protector inwardly coplng or overlapping shellwhich extends inwardly to about the point where the threads of pipe, 4merge into theouter surface or terminate. when the device is screwed uptight,as in Fig. 1. Also, that the outer terminal of rim 6 occupies aposition substantially parallel with the opposite terminal 7, as theends of the original blank were related to eachother and to thelongitudinal center, before forming the blankinto the finished article.

The "inner wall coping portion of the device, terminating 1n end 7, isleft smooth as shown, and tapers substantially with the taper of thethreads 5, providing a smooth inner annular wall surface 8 which assumesa close embracing position around the threads, as shown. and the threads5, is the outwardly rounded bulging ring 9, the innerwall of which isabruptly spaced away from the threaded zone of the protector and of thepipe, leaving a surrounding interior open space 10 and providing theouter rounded surface 11.

- This portion of the protector is, of advantage in giving added bracingstrength, and also provides an annular extended rounded ring on WlllChthe pipe may be easily rolled,

{QT-he remaining threaded portion, di

95. Between such coping especially when equipped with a 'protector ateach end.

The manufacture of the complete device involves endwise swaging orupsetting to effect the formation of the bulge 9, and also of theterminal flaring end (S, and also the relative contraction of the middleportion bearin the threads 5. Likewise, the longitudinaI upsetting tendsto condense and thicken the wall, in connection with its diametricalreduction, so that ample excess stock is provided for cutting thethreads without any weakening of the wall.

The several swaging operations on the blank, with suitable dies, give itthe desired tapered form, ready for cutting the thread, after which theterminal flare 6 is formed. This latter feature is a novel and usefulone in thread protectors of this type, in that it extends outwardlybeyond the end of the pipe and efficiently protects the threads frominjury, either by ,direct contact with any obstruction, or from thedanger of a dent in the end of an ordinary straight .wall protector.

The terminal flare 6 with the rounded bulging ring 9 beyond, also leavesan intervening annular channel or recess 12, providing a convenientgrasping area for a turning wrench or tongs, and assisting in keepingsuch tool-in place.

By reason of its annular reinforcing enlargements, I am enabled'to makethe protector of metal'of minimum-gauge or thick ness, due to its addedbra'cingstrength, and with corresponding economy. The device maybe madein any desired size or. dimensions; it is very strong and durable, welladapted to the purpose in view, and capable of repeated use. Itmay bemade indifferent proportions from those shown, or changed in detailconstruction by the skilled mechanic, but all such changes are to beconclaims.

sidered as within the scope of the following tion intermediate its endsand a tapering unthreaded coping portion with its inner surface adaptedto be spaced beyond the threads of the threaded member, said sleevebeing further provided with an interiorly threaded portion extending inthe other di- 5 rection beyond the bearing ring and terminating in aninterior outwardly flaring unthreaded portion.

, 2. A threaded protector comprising an annular sleeve interiorlythreaded for a portion of its length, another portion being providedwith a rounded shoulder extending'beyond the normal outer wall of thesleeve between the threaded portion and its inner end, and having anoutwardly flaring terminal beyond the opposite end of the threadedportion.

3. A thread protector for pipes compris ing a cylindrical tapered sleeveprovided with a tapered interiorly smooth terminal coping portionmerging into an outwardly bulging annular ring portion intermediate theends of the sleeve, and a threaded portion extending from said outwardlybulging ring portion towards the other end of the sleeve, said sleeveterminating in a short interior flaring portion.

, 4. A thread protector for pipes comprising a cylindrical taperedsleeve provided with a tapered interiorly smooth coping portion, anoutwardly bulging annular ring portion extending inwardly beyond thecoping portion, and a threaded portion extending from said ring portionto its' other end,

the sleeve being there abruptly turned outwardly to form a flaringterminal.

In testimony whereof I hereunto aflix my signature.

PETER J. sHRUM.

